function validate(form_id,email) 
{
	var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
	var address = document.forms[form_id].elements[email].value;
	if(reg.test(address) == false)
	{
		alert('Invalid Email Address');
		return false;
	}
}